Cassandra Bost
Compass
(707) 940-7275
10 Total Sales
8 in Sonoma
$729K - $3.2M Price Range
20580 Palmer Ave Sonoma, CA 95476
Sonoma AreaEstimated Value: $3,857,892
4
Beds
3
Baths
3,160
Sq Ft
$1,221/Sq Ft
Est. Value
Highlights
- Heated In Ground Pool
- 3.02 Acre Lot
- Private Lot
- Built-In Freezer
- Contemporary Architecture
- Wood Flooring
About This Home
As of May 2026Tucked behind a new custom entry gate at the end of a charming country road, this ~3,160 sq. ft. modern Wine Country retreat offers seamless indoor-outdoor living on 3.02 oak-studded acres, with approved plans for a ~1,200 sq. ft. 2BD ADU. The 4BD/3BA home features newly installed white-oak floors and Fleetwood sliders that open to a dramatic screened sunroom for al fresco entertaining, complete with dining and lounge areas, skylights, speakers, and a heater. The chef's kitchen centers around a striking concrete island with marble slab backsplash, custom cabinetry, premium appliances, and a separate scullery with wine storage and extra refrigeration. Resort-style grounds include a 13'60' pool with new automatic cover, fire pit, fruit trees, and level space for tennis or pickleball courts. The primary suite enjoys a private hot tub. A 3-car garage offers epoxy floors, gym flooring, and new translucent doors. Additional updates include a new roof, gutters, drainage, Sonos, security with cameras, HVAC, pool heater, and landscaping with 15 olive trees. Ideally located minutes to Sonoma Plaza, The Lodge at Sonoma, Wit & Wisdom, Train Town, wineries, restaurants, trails, and other vacation amenities.
Last Agent to Sell the Property
Caroline Sebastiani
Sotheby's International Realty License #01371992 Listed on: 04/13/2026
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Home Details
Home Type
- Single Family
Year Built
- Built in 2000 | Remodeled
Lot Details
- 3.02 Acre Lot
- Property is Fully Fenced
- Private Lot
Parking
- 3 Car Attached Garage
- Enclosed Parking
- Inside Entrance
- Front Facing Garage
- Garage Door Opener
- Guest Parking
Home Design
- Contemporary Architecture
- Modern Architecture
- Side-by-Side
- Composition Roof
- Fiberglass Roof
- Concrete Perimeter Foundation
Interior Spaces
- 3,160 Sq Ft Home
- 1-Story Property
- Wet Bar
- Fireplace With Gas Starter
- Window Screens
- Dining Room with Fireplace
- Wood Flooring
Kitchen
- Breakfast Bar
- Butlers Pantry
- Double Oven
- Built-In Gas Range
- Range Hood
- Microwave
- Built-In Freezer
- Built-In Refrigerator
- Ice Maker
- Dishwasher
- Wine Refrigerator
- Kitchen Island
- Marble Countertops
- Concrete Kitchen Countertops
- Disposal
Bedrooms and Bathrooms
- 4 Bedrooms
- Separate Bedroom Exit
- Walk-In Closet
- Jack-and-Jill Bathroom
- 3 Full Bathrooms
- Dual Vanity Sinks in Primary Bathroom
- Separate Shower
Laundry
- Laundry closet
- Dryer
- Washer
Home Security
- Security System Leased
- Security Gate
- Carbon Monoxide Detectors
- Fire and Smoke Detector
Pool
- Heated In Ground Pool
- Spa
- Gas Heated Pool
- Pool Cover
- Pool Sweep
Outdoor Features
- Outdoor Kitchen
- Fire Pit
- Shed
- Rear Porch
Utilities
- Central Heating and Cooling System
- Radiant Heating System
- 220 Volts in Kitchen
- Private Water Source
- Well
- Water Heater
- Internet Available
- Cable TV Available
Ownership History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
Date
Name
Owned For
Owner Type
Purchase Details
Listed on
Apr 13, 2026
Closed on
May 1, 2026
Sold by
Bought by
Seller's Agent
Caroline Sebastiani
Sotheby's International Realty
Buyer's Agent
Matt Sevenau
Compass
List Price
$4,675,000
Sold Price
$4,675,000
Views
44
Current Estimated Value
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Estimated Appreciation
-$817,108
Avg. Annual Appreciation
-53.63%
Purchase Details
Listed on
Jan 16, 2023
Closed on
Feb 16, 2023
Sold by
Bought by
Seller's Agent
Tracy Reynes
Compass
List Price
$3,795,000
Sold Price
$3,538,750
Premium/Discount to List
-$256,250
-6.75%
Views
28
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
9.09%
Original Mortgage
$3,123,750
Interest Rate
5.76%
Mortgage Type
Balloon
Purchase Details
Listed on
Sep 21, 2021
Closed on
Oct 29, 2021
Sold by
Bought by
Seller's Agent
Erin Davis
Compass
Buyer's Agent
Tracy Reynes
Compass
List Price
$3,200,000
Sold Price
$3,200,000
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
8.05%
Purchase Details
Closed on
Feb 10, 2014
Sold by
Bought by
Purchase Details
Closed on
Dec 27, 2007
Sold by
Bought by
Purchase Details
Closed on
Jun 29, 2007
Sold by
Bought by
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$1,220,000
Interest Rate
6.37%
Mortgage Type
Unknown
Purchase Details
Closed on
Nov 23, 1998
Sold by
Bought by
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$195,000
Interest Rate
6.84%
Mortgage Type
Seller Take Back
Home Values in the Area
Average Home Value in this Area
Agents Specializing in Sonoma, CA
-
Cassandra Bost
-
Charlie Luna
Charlie Luna
Sotheby's International Realty
(628) 209-5317
18 Total Sales
16 in Sonoma
$1.2M - $13M Price Range
-
Heidi Faulkner
Heidi Faulkner
Artisan Sotheby's Int'l Realty
(707) 899-0742
46 Total Sales
1 in Sonoma
$650,000 Price
-
Monica Wason
Monica Wason
M2 Realty Group
(831) 275-1395
30 Total Sales
1 in Sonoma
$1,000,000 Price
-
Oggi Kashi
Oggi Kashi
North Point Real Estate
(415) 619-5117
40 Total Sales
1 in Sonoma
$4,600,000 Price
-
Milli Cannata
Milli Cannata
Vanguard Properties
(707) 634-2349
76 Total Sales
1 in Sonoma
$140,000 Price
Purchase History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Buyer | Sale Price | Title Company |
|---|---|---|---|
| $4,675,000 | Fidelity National Title Compan | ||
| $3,539,000 | First American Title | ||
| $3,200,000 | First American Title Company | ||
| -- | None Available | ||
| -- | None Available | ||
| -- | None Available | ||
| -- | None Available | ||
| $1,525,000 | First American Title Company | ||
| $325,000 | Fidelity National Title Co |
Source: Public Records
Mortgage History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Status | Borrower | Loan Amount |
|---|---|---|---|
| Previous Owner | $3,123,750 | ||
| Previous Owner | $1,220,000 | ||
| Previous Owner | $195,000 |
Source: Public Records
Property History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Event | Price | List to Sale | Price per Sq Ft | Prior Sale |
|---|---|---|---|---|---|
| 05/05/2026 05/05/26 | Sold | $4,675,000 | 0.0% | $1,479 / Sq Ft | |
| 04/30/2026 04/30/26 | Pending | -- | -- | -- | |
| 04/13/2026 04/13/26 | For Sale | $4,675,000 | +32.1% | $1,479 / Sq Ft | |
| 02/22/2023 02/22/23 | Sold | $3,538,750 | -6.8% | $1,041 / Sq Ft | View Prior Sale |
| 02/15/2023 02/15/23 | Pending | -- | -- | -- | |
| 01/16/2023 01/16/23 | For Sale | $3,795,000 | +18.6% | $1,116 / Sq Ft | |
| 11/05/2021 11/05/21 | Sold | $3,200,000 | 0.0% | $941 / Sq Ft | View Prior Sale |
| 10/20/2021 10/20/21 | Pending | -- | -- | -- | |
| 09/21/2021 09/21/21 | For Sale | $3,200,000 | -- | $941 / Sq Ft |
Source: Bay Area Real Estate Information Services (BAREIS)
Tax History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2025 | $43,355 | $3,681,715 | $1,664,640 | $2,017,075 |
| 2024 | $42,526 | $3,609,525 | $1,632,000 | $1,977,525 |
| 2023 | $42,526 | $3,264,000 | $1,479,000 | $1,785,000 |
| 2022 | $37,998 | $3,200,000 | $1,450,000 | $1,750,000 |
| 2021 | $23,878 | $1,965,960 | $873,706 | $1,092,254 |
| 2020 | $23,832 | $1,945,803 | $864,748 | $1,081,055 |
| 2019 | $23,314 | $1,907,651 | $847,793 | $1,059,858 |
| 2018 | $22,857 | $1,870,247 | $831,170 | $1,039,077 |
| 2017 | $23,236 | $1,833,576 | $814,873 | $1,018,703 |
| 2016 | $21,308 | $1,797,625 | $798,896 | $998,729 |
| 2015 | $18,389 | $1,568,000 | $697,000 | $871,000 |
| 2014 | $14,348 | $1,200,000 | $533,000 | $667,000 |
Source: Public Records
Agents Affiliated with this Home
-
C
Seller's Agent in 2026
Caroline Sebastiani
Sotheby's International Realty
-
Charlie Luna
Seller Co-Listing Agent in 2026
Charlie Luna
Sotheby's International Realty
(415) 827-8885
18 Total Sales
-
Matt Sevenau
Buyer's Agent in 2026
Matt Sevenau
Compass
(707) 934-5630
194 Total Sales
-
T
Seller's Agent in 2023
Tracy Reynes
Compass
-
Erin Davis
Seller's Agent in 2021
Erin Davis
Compass
(707) 217-4790
29 Total Sales
-
K
Seller Co-Listing Agent in 2021
Kelly Stober
Compass
Map
Source: Bay Area Real Estate Information Services (BAREIS)
MLS Number: 326021230
APN: 128-311-078
Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.
Listing information deemed reliable but not guaranteed. Copyright 2026 Bay Area Real Estate Information Services, Inc. All Right Reserved.
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